The Ravin bow press is specifically designed for the maintenance of Ravin crossbows, ensuring optimal performance and safety. It is essential to replace strings and cables every 2 years or after 200 shots, whichever comes first, to maintain the crossbow's functionality. When performing these replacements, only the Ravin Press should be used, as it is tailored for the unique specifications of Ravin models. The Ravin Bow Press is compatible exclusively with the R500, R500E, R500 Sniper and R500E sniper models. Users must thoroughly read and adhere to the instructions and warnings provided with the Ravin Bow Press to ensure safe and effective use. Compatible exclusively with Ravin R500, R500 sniper, R500E and R500E sniper models Strings should be replaced every 2 years or after 200 shots Utilize Exclusively the Ravin Bow Press It is advised to have the strings and cables replaced at your local pro shop or the Ravin service department